Auto emergency-brake.



WIH'. INNIS, JR. AUTO EMERGENCY BRAKE.

APPLICATION FILED APR. 10; 1913.

1,088,1 5 1 Patented Feb. 24, 1914.

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W. H. INNIS, Jn. AUTO EMERGENCY BRAKE. nrucmxon nun um. 10, um.

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W..H. INNIS, JR. AUTO EMERGENCY BRAKE.

APPLICATION FILED APR. 10, 1913.

Patented Feb. 24, 1914.

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Vi tmeooeo WARREN" H. INNIS, J'R., 0F SACRAMENTO, CALIFOBNTA.

AUTO EMERGENCY-BRAKE.

Specification of Letters Patent.

Patented Feb. 24, 1914.

' Application filed April 10, 1913. Serial No. 760,183.

To all whom it may concern:

Be it known that I, WARREN H. INNIS, Jr., a'citizen of the UnitedStates, residing at Sacramento, in the county of Sacramento and State ofCalifornia, have invented certain new and useful Improvements in AutoEmergency-Brakes, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to improvements in emergency brakes designedparticularly for motor driven vehicles, and has for its'object, theprovision of a brake of the character stated which will be simple inconstruction, capable of ready application, and efficient in operation.

The' preferred embodiment of the invention comprises bra-kinginstrumentalities 0perable independently of the usual foot and handoperable brakes commonly constituting a part of the equipment of motorvehicles, said emergency brakerequiring the furnishing of butfewadditional parts to the ordinary motor vehicle structure; and more'specifically an emergency brake op-- 'erable through the medium of theexhaust gases of the propelling gas engine of the vehicle to apply thebraking force in a direct and effective manner, and conveniently also tosimultaneously release the clutch between .the engine and drive shafts.

The above mentioned preferred embodiment of the invention possesses manycharacteristic features to be hereinafter more fully described in theappended detailed description, among which may be generally noted apiston within a cylinder adapted to'be actuated by the exhaust gasesdirectly associated with a rock shaft, in turn coupled to the brake;means associated with the piston for releasing the clutch; a valve forpermitting the exhaust gas to escape or be directed to the cylinder, asthe case may be, said valve comprising two members operating conjointlyto close the exhaust passage, while being adapted in part to yield underexcessive pressure in the brake actuating cylinder to ease-up, so tospeak, the brakeapplying pressure, thus avoiding severe looking andskidding of the wheels of the vehicle; and improved means associatedwith or located adjacent to the steering mechanism for actuating thevalve in keeping with the desire of the operator.-

The foregoing, together with many other details in construction andarrangement of parts will be more readily understood by reference to theaccompanying drawings form ing part hereof and wherein the abovementioned preferred embodiment of the invention is illustrated.

In the drawings: 'Figure 1 is-a top plan view, largely diagrammatic andfragmentary, showing my emergency brake applied thereto; Fig. 2 1s afragmentary side eleva-' tlon of the brake mechanism, associated view ofthe end of the exhaust pipe and the valve connected thereto, the latterbeing shown in open position.

Referring more specifically to the drawings wherein like referenceletters refer to corresponding parts in the several views, A representsthe gas engine adapted to propel the vehicle B, said engine beingmounted in any convenient or preferred manner upon thechassis or frameC.

'D is the exhaust manifold receiving the exhaust gases from the fourengine cylinders, opening to-a common exhaust pipe E,"

connected to and opening into one end of a muflier F, the specificconstruction of which latter need not be herein discussed. At a pointbetween the muflier F and exhaust manifold l), the exhaust pipe E opensto a pipe G connected laterally therewith and leading to the rear end ofa brake cylinder H, secured as at h, to the vehicle frame, or in anyother fixed manner found expedient and practical. The cylinder H isprovided with a piston. I, having a piston rod J, extending through theforward head or end thereof, -a spring K being interposed between saidforward end of the cylinder and the piston I, and constantly exerting anexpansive influence against the piston to throw the piston to the rearend of the cylinder when otherwise unresisted, as by the pressure of theexhaust gases adapted to operate the piston, to'which I shall presentlyallude. The forward end of the piston rod J is flatvide a wire or cableQ,

tened, as at y, and slotted as at j, to receive the depending crank orarm Z of a horizontal rock shaft L, in turn connected through the mediumof depending cranks or arms Z, and links m with actuating arms or cranksm of the brakes M, of any standard'or preferred type not constitutingpart of the present invention. The forward end' j o the piston rod isalso connected through the medium of a link n, to a horizontallydisposed lever '21,, pivoted intermediate of its ends to the frame-work,as at n, the opposite end of said lever being loosely connected to onemember of a clutch N, also conveniently shown, merely in a diagrammaticmanner, to illustrate the combination or princile involved herein, thedetails of the clutch, like the brake, not being essentially involved.At the mouth of the muflier F, communication between the end of the pipeG and the exhaust pipe E, I provide a valve consisting of a r1ngshapedmember 0,

and disk P, the ring-shaped member being hinged to the end of theexhaust pipe E, as at 0, and provided with a spring 0 acting normally tothrow the valve open into the horizontal position illustrated in Fig. 5,when the exhaust gases discharging-from the engine into the exhaust pipeE may pass freely into and through the mufller F.

he valve disk I is mounted for a freedom of movement with reference tothe valve ring 0, through the medium of pins p secured at their ends toopposite portions of the ring 0, and passing freely through perforatedears on the disk P, the pins having heads at their outer ends, andsprings p sleeved on the pins and bearing at opposite ends against thedisk 79, and the in heads p exerting a constant pressure ten ing toclose and maintain in closed osition the disk P, against the ring 0, wile permitting the disk to yield with reference to the ring underextreme pressures, within the exhaust pipe when the valve is in closedposition, as indicated in Fig. 7 wherein the relieving position of thevalve is shown.

As a means for operating the valve against the opening pressure of thespring 0' in order to close the valve in its seat against the end of theexhaust pipe I probranched at its ends, to the opposite sides and beconnected at as at Q to lie adjacent of the exhaust pipe E the terminalportions to alined perforated lugs R, projecting from the opposite sidesof the valve ring 0. The wire Q, is adapted to project along or acrossthe frame of the vehicle, guided by rollers S where necessary, to avoidobstructions, preferably to the lower portion of the usual steering postT,

within which it may pass upwardly to a point near the customary steeringwheel U where the upper terminal of the wire or cable is passed radiallyof the wheel through eyond the aneye or around a sheave V and connectedto the end of an operating lever W. The cable or cord being relaxed, inthe first position of the lever the valve is normally permitted toremain 0 on or to automatically open, while the shi ting of the lever toits lower 'or second position, as shown, correspondingly draws the cableupwardly, closing the valve, as will be ap arent.

X is the ordinary foot ever, connected through the medium of the link Yto one of the depending arms or-cranks shaft L, whereby the brake may beoperated by the foot in the usual way, the slot 7" in the forward end ofthe piston rod J permitting the arm 1 to swing orwardly under theactuation of the foot lever X without effecting the piston I, while onthe other hand, said arm I being normally near the rear wall of the slotj, the rock shaft may be promptly actuated by means of said arm Egon theforward movement ofthe piston r From the description hereinabovecontained it will be apparent that the operating lever W being in its upermost position, the valve OP 1s norma y held open by the spring 0 sothat a free exhaust is afforded from the engine cylinders A through themanifold D and exhaust pipe E to the muffler F. However, upon melelythrowing the lever W to its lower lposition, the valve O-P is swungupward y against the pressure of the spring 0' and the communicationbetween the exhaust ipe E and mufller obstructed incident to t e seatingof the valve against. said exhaust pipe, so that the exhaust gases willpass throw h pi e G into the rear end of the cylinder an force thepiston I forwardly in oppos'tion to the sprin K, correspondinglyactuatin the rock shaft to apply the brakes M and through the link n andpivoted lever the clutch member N and freeing the drive shaft from theengine. In order to prevent a too severe lockin of the wheels andconsequent skidding, t e valve members 0-? are ad'usted by means of theheads p, which ave a threaded adjustable engage ment with the pins p toregulate the pressure of the springs p" so that when the pressure in theexhaust pipe and cylinder H reaches a predetermined degree the valvedisk P will automatically open to permit a partial discharge of theexhaust into the muflier, thereby relieving such pressure and s to thesame extent easin up the pressure of the braking force. en the pressureis released from the cylinder, the spring K will reset the pistonand'associated parts to normal osition.

W ile I haveherein disclosed one embodiment ofiny. invention, I desireit understood that the same is capable of embodimentin othenforms andarrangements, as will appeal to persons skilled in the art to l of therock n, withdrawing which the invention relates, and asnnay be inkeeping with the annexed claims.

Havin thus described the invention, what is claime is 2- *1. Incombination with a brake for motor vehicles, a fluid pressure means foractuating the same, a constantly open source of supply leading directlto said means, a valve located beyond t e point of connection betweensaid source of suppl and said fluid pressure means, and control ingmeans for said valve, said valve being formed to relieve abnormalpressure on the brake when the valve is in its closed osition.

2. In combination wit a brake for n10- tor vehicles, a fluid pressuremeans for ac tuating the same, a constantly open source of supplyleading directly to said means, a valve located beyond the point ofconnection between said source of supply and said fluid pressure means,and controlling meansfor said valve, said valve being formed to relieveabnormal pressure on the brake when the valve is in its closed position,and both the valve and its relief portion being adapted to openoutwardly, substantially as described.

3. An emergency brake for motor vehicles comprising braking means, aiston for actuating the-same, a source 0 Sn ply leading to said iston, avalve, control ing means for said va ve, said valve being hinged at oneedge, and means for normall throwing the same into open position, saivalve being formed to relieve the pressure in the cy inder when thevalve is in its. closed position, substantially as described.

4. A brake for motor vehicles, comprising brakin means, fluid pressuremeans for actuating t e same, a source of supply'therefor, a valve,controlling means for said valve, said valve bein hinged at one edge andadapted to norma ly open, and means for controlling the valve, saidvalve being also formed to relieve the pressure on the brake when thevalve is in its closed position.

5. An emergency brake for motor vehicles comprising brakinginstrumentalities, a piston for operating the same, a cylinder for saidpiston, an exhaust pipe leading from the engine cylinders to said, brakecylinder, a valve in said pipe normally held open, and means for closingthe valve having an actuating part arranged near the steering mechanism,and a flexible connection running therefrom to the valve, said valvehaving a yieldable part adapted to, relieve gaseous pressure in thecylinder, substantially as described.

6. An emergency brake for motor vehicles comprising brakinginstrument'alities, a piston for actuating the same, a cylinder for saidpiston, a source of supply leading to said cylinder, and meansautomatically regulating the ressure in said cylinder, in combinationwit means for manually operating said means, substantially as described.

In testimon whereof I afiix my signature in presence 0 two witnesses.

. WARREN H. INNIS, JR.

Witnesses:

H. N. BURLINGHAM, J. J. HENDERSON.

